Multistage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid

Abstract

The utility model discloses a multi-stage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid, relates to the technical field of waste liquid treatment, and aims to solve the problems that a conventional adsorption device cannot treat a large amount of unsymmetrical dimethylhydrazine waste liquid in time, so that the waste liquid is possibly leaked, and the body health and the environmental ecology are harmed. The utility model provides a multi-stage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid, which comprises a plurality of adsorption columns, a liquid inlet is arranged at the bottom of each adsorption column, a liquid outlet is arranged at the top of each adsorption column, two-way connectors are arranged at the liquid inlets and the liquid outlets, and the two-way connectors are respectively connected with the adsorption columns. One interface of the two-way joint at the bottom of the first adsorption column is connected with an unsymmetrical dimethylhydrazine wastewater storage tank through a pipeline, and one interface of the two-way joint at the bottom of each of the other adsorption columns is sequentially connected in series with one interface of the two-way joint at the top of the adjacent adsorption column through a pipeline. Different requirements of waste liquid treatment can be met, and rapid treatment of waste liquid can be achieved for sudden large-amount waste liquid leakage treatment.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste liquid treatment technical field, concretely relates to a multistage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid. BACKGROUND

[0002] Unsymmetrical dimethylhydrazine is a combustion agent widely used in the power system of rocket and missile in China, and is the largest liquid propellant fuel at present. According to the toxicity classification standard of chemical substances, unsymmetrical dimethylhydrazine is a medium toxic substance of class III, is a colorless transparent liquid at normal temperature, is flammable, explosive, volatile and corrosive, has an ammonia-like (fishy) odor, has a strong reducing effect, and can cause multiple organ damage of nervous system, respiratory system, digestive system and blood system.

[0003] During fuel transportation, transfer and storage, the unsymmetrical dimethylhydrazine waste liquid may run, overflow, drip and leak due to the influence of air, moisture and equipment. If the waste liquid containing unsymmetrical dimethylhydrazine is not treated in time, it will diffuse into water sources, soil and building surfaces through volatilization, which not only damages the health of personnel, but also brings long-term malignant influence to the living environment and natural environment. When static intermittent adsorption treatment is carried out by adding adsorbent, the adsorbent is not easy to recover, and the adsorption time is long.

[0004] Unsymmetrical dimethylhydrazine is a high-energy fuel with excellent performance and is widely used in rocket propellants, but it has great toxicity and volatility. Conventional adsorption devices cannot deal with sudden unsymmetrical dimethylhydrazine waste water in time, which may cause waste liquid leakage and harm to health and environment; and the conventional adsorption device is large in size and not easy to carry. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model aims at providing a multistage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid, which can efficiently treat unsymmetrical dimethylhydrazine waste water, can avoid environmental pollution caused by using other chemical reagents or other processes, can improve the treatment efficiency of waste liquid, and can simplify the waste water treatment process.

[0006] The main idea of the technical scheme adopted by the utility model is that by designing a plurality of adsorption columns in series, single column, double column or three column series operation can be selected according to needs to meet various use scenarios; the flow direction of waste water in the adsorption column is low in and high out, which can increase the contact time of adsorbent and unsymmetrical dimethylhydrazine waste water and improve the adsorption performance.

[0007] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0008] A kind of multistage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid, the adsorption device includes multiple adsorption columns, the bottom of each adsorption column is provided with liquid inlet, the top of each adsorption column is provided with liquid outlet, two-way joint is arranged at the liquid inlet and the liquid outlet, one interface of two-way joint at the bottom of the first adsorption column is connected with unsymmetrical dimethylhydrazine wastewater storage tank by pipeline, one interface of two-way joint at the bottom of the remaining adsorption column is connected with one interface of two-way joint at the top of adjacent adsorption column by pipeline in sequence.

[0009] By the above technical scheme, further: the other interface of two-way joint at the top of each adsorption column is connected with liquid discharge pipe, the other interface of two-way joint at the bottom of adsorption column is connected with sewage pipe.

[0010] By the above technical scheme, further: the adsorption column is provided with adsorption structure, and the adsorption structure includes polytetrafluoroethylene sieve plate, quartz sand, adsorbent, quartz sand and polytetrafluoroethylene sieve plate arranged in sequence.

[0011] By the above technical scheme, further: the pipeline connected with the adsorption column and unsymmetrical dimethylhydrazine wastewater storage tank is provided with peristaltic pump, first rotor flowmeter and second rotor flowmeter, and the first rotor flowmeter and the second rotor flowmeter are connected with the peristaltic pump.

[0012] The beneficial effects of the utility model are:

[0013] 1, by designing multiple adsorption columns in series, single column, double column, three column series operation can be selected according to the needs, meet the different needs of waste liquid treatment, face the sudden large amount of waste liquid leakage disposal, can realize the rapid treatment of waste liquid.

[0014] 2, the wastewater in the adsorption column uses low-in high-out flow direction, which can increase the contact time of adsorbent and unsymmetrical dimethylhydrazine wastewater, improve the adsorption performance, reduce the time and labor cost of waste liquid treatment.

[0015] 3, the device integrates adsorption and in-situ regeneration device, which is simple in structure, small in land occupation, convenient to use, low in cost and easy to operate. DETAILED DESCRIPTION

[0016] Figure 1 It is a structural schematic view of the utility model;

[0017] Wherein: 1, unsymmetrical dimethylhydrazine wastewater storage tank; 2, peristaltic pump; 3, ball valve one; 4, ball valve two; 5, first rotor flowmeter; 6, second rotor flowmeter; 7, ball valve three; 8, ball valve four; 9, first adsorption column; 10, ball valve five; 11, ball valve six; 12, second adsorption column; 13, ball valve seven; 14, ball valve eight; 15, third adsorption column; 16, adsorbent; 17, quartz sand; 18, polytetrafluoroethylene sieve plate; 19, ball valve nine; 20, ball valve ten; 21, ball valve eleven. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0019] The inventor has found that unsymmetrical dimethylhydrazine is a high-energy fuel with excellent performance and is widely used as a rocket propellant, but itself has great toxicity and volatility. The conventional adsorption device still has the following problems in the treatment of sudden unsymmetrical dimethylhydrazine wastewater: 1. The conventional adsorption device cannot be disposed of in time when a large amount of waste liquid is treated, which may cause waste liquid leakage and harm to health and the environment. 2. The conventional adsorption device is large in size and not easy to carry.

[0020] Based on the above findings, the present application proposes a multi-stage dynamic adsorption device for treating unsymmetrical dimethylhydrazine wastewater. By designing a plurality of adsorption columns in series, single-column, double-column, and three-column series operation can be selected according to needs to meet various use scenarios. The flow direction of the wastewater in the adsorption column is from low to high, which can increase the contact time of the adsorbent and the unsymmetrical dimethylhydrazine wastewater and improve the adsorption performance.

[0021] Embodiment one

[0022] Referring to Figure 1 The present application discloses a multi-stage dynamic adsorption device for treating unsymmetrical dimethylhydrazine wastewater, comprising an unsymmetrical dimethylhydrazine wastewater storage tank 1 for containing waste liquid containing unsymmetrical dimethylhydrazine. The unsymmetrical dimethylhydrazine wastewater storage tank 1 is connected with a peristaltic pump 2 through a pipeline.

[0023] The peristaltic pump 2 is connected with two rotameters arranged in parallel through a connecting pipe, and the output end of the peristaltic pump 2 is connected with the two rotameters through pipes respectively, the two rotameters are a first rotameter 5 of 0.4-4 mL / min and a second rotameter 6 of 1.6-16 mL / min, a ball valve one 3 is arranged between the peristaltic pump 2 and the first rotameter 5, and a ball valve two 4 is arranged between the peristaltic pump 2 and the second rotameter 6; in use, according to different flow rates, a suitable range can be selected, so that the corresponding ball valve is opened, the waste liquid flows to the corresponding rotameter, and the purpose of accurate control is achieved.

[0024] The first rotameter 5 and the second rotameter 6 are both connected with the liquid inlet at the bottom of the first adsorption column 9, a ball valve three 7 is arranged between the first rotameter 5 and the liquid inlet at the bottom of the first adsorption column 9, and a ball valve four 8 is arranged between the second rotameter 6 and the liquid inlet at the bottom of the first adsorption column 9.

[0025] The flow of the first rotameter 5 and the second rotameter 6 is controlled by the ball valve one 3 or the ball valve two 4 respectively, the ball valve one 3 and the ball valve three 7 are opened, and the ball valve two 4 and the ball valve four 8 are closed when the first rotameter 5 is used; the ball valve two 4 and the ball valve four 8 are opened, and the ball valve one 3 and the ball valve three 7 are closed when the second rotameter 6 is used.

[0026] The first adsorption column 9 has a columnar structure, has a cavity inside, and has a liquid outlet at the top and a liquid inlet at the bottom on the upper and lower sides respectively, and a two-way connector is arranged at the liquid inlet and the liquid outlet. An adsorption structure is arranged in the middle of the cavity of the first adsorption column 9, and the adsorption structure comprises polytetrafluoroethylene sieve plates 18, quartz sand 17, adsorbent 16, quartz sand 17 and polytetrafluoroethylene sieve plates 18 arranged from bottom to top. The adsorption structure is a symmetrical structure from top to bottom, which is convenient for installation and does not need to distinguish the installation position. The adsorbent 16 is made of a material capable of adsorbing unsymmetrical dimethylhydrazine.

[0027] One port of the two-way connector at the liquid outlet of the first adsorption column 9 is connected with a drainage pipe, which can directly drain the wastewater treated by the first adsorption column 9, and a ball valve five 10 is arranged on the drainage pipe to control the outflow of the waste liquid; the other port is connected with one port of the two-way connector at the bottom of the second adsorption column 12 through a pipe, and a ball valve six 11 is arranged on the pipe to control whether the waste liquid flows into the second adsorption column 12, so that the wastewater treated by the first adsorption column 9 can enter the second adsorption column 12 through this channel for re-adsorption.

[0028] The second adsorption column 12 is identical in structure to the first adsorption column 9. One interface of the two-way joint at the liquid outlet of the second adsorption column 12 is connected with a liquid discharge pipe, which can directly discharge the wastewater treated by the second adsorption column 12, and a ball valve 7 13 is arranged on the pipe to control the outflow of the wastewater. The other interface is connected with one interface of the two-way joint at the bottom of the third adsorption column 15 through a pipe, and a ball valve 8 14 is arranged on the pipe to control whether the wastewater flows into the third adsorption column 15, so that the wastewater treated by the second adsorption column 12 can enter the third adsorption column 15 for further adsorption.

[0029] The third adsorption column 15 is identical in structure to the first adsorption column 9 and the second adsorption column 12. A liquid discharge pipe is connected to the liquid outlet at the top of the third adsorption column 15, which can directly discharge the wastewater treated by the third adsorption column 15.

[0030] A drain pipe is arranged at the other interface of the two-way joint at the bottom of the first adsorption column 9, the second adsorption column 12 and the third adsorption column 15, respectively, for quickly discharging the wastewater remaining in the pipes and the adsorption columns without being treated, and a ball valve 9 19, a ball valve 10 20 and a ball valve 10 20a are arranged at the liquid inlets at the bottom of the first adsorption column 9, the second adsorption column 12 and the third adsorption column 15, respectively, for controlling the discharge of the remaining wastewater.

[0031] Example 2

[0032] Since the hydrazine and polytetrafluoroethylene are compatible in the first phase, in order to reduce the adsorption of hydrazine on the adsorption device, the first adsorption column 9, the second adsorption column 12, the third adsorption column 15 and the connecting pipes in the device are all made of polytetrafluoroethylene material.

[0033] The first adsorption column 9, the second adsorption column 12 and the third adsorption column 15 have a size of Φ16x1 mm (outer diameter 16 mm, inner diameter 14 mm) and are connected by using a four-fluorine tube and a four-fluorine sleeve joint. The height is 200 mm.

[0034] Application case

[0035] The device has a structure of multiple adsorption columns in series, adopts a low-in and high-out process, and can be operated in single column, double column or triple column in series according to needs. When operated in single column, the ball valve 6 11 is closed and the ball valve 5 10 is opened. When operated in double column in series, the ball valve 5 10 and the ball valve 8 14 are closed, and the ball valve 6 11 and the ball valve 7 13 are opened. When operated in triple column in series, the ball valve 5 10 and the ball valve 7 13 are closed, and the ball valve 6 11 and the ball valve 8 14 are opened.

[0036] Taking the example of triple column in series and using the first rotor flowmeter 5 for measurement, the specific use process is as follows:

[0037] 1. Before starting the adsorption treatment, close ball valves 2 (4), 4 (8), 5 (10), 7 (13), 9 (19), 10 (20), and 10 (201). Open ball valves 1 (3), 3 (7), 6 (11), and 8 (14). Place the wastewater discharge pipe into the unsymmetrical dimethylhydrazine wastewater storage tank 1. After the liquid flows through the peristaltic pump 2, it is metered by the first rotor flowmeter 5 or the second rotor flowmeter 6 and enters the bottom of the first adsorption column 9. Then, it enters the bottom of the second adsorption column 12 from the top of the first adsorption column 9. Next, it enters the bottom of the third adsorption column 15 from the top of the second adsorption column 12. Finally, the adsorbed wastewater is discharged from the top of the third adsorption column 15.

[0038] 2. After the process is complete, open ball valve 919, ball valve 1020, and ball valve 10201 to quickly drain the wastewater remaining in the pipeline and adsorption column after the adsorption treatment.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage dynamic adsorption apparatus for treating unsymmetrical dimethylhydrazine waste solution, characterized by: The adsorption device comprises a plurality of adsorption columns, the bottom of each adsorption column is provided with a liquid inlet, the top of each adsorption column is provided with a liquid outlet, a two-way joint is arranged at the liquid inlet and the liquid outlet, one port of the two-way joint at the bottom of the first adsorption column is connected with a hydrazine waste water tank (1) through a pipeline, and one port of the two-way joint at the top of the adjacent adsorption column is connected with one port of the two-way joint at the bottom of the remaining adsorption column through a pipeline in sequence.

2. The multi-stage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid according to claim 1, characterized in that: The other port of the two-way joint at the top of each adsorption column is connected with a liquid discharge pipe, and the other port of the two-way joint at the bottom of each adsorption column is connected with a sewage discharge pipe.

3. The multi-stage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid according to claim 2, characterized in that: The adsorption column is provided with an adsorption structure, and the adsorption structure comprises polytetrafluoroethylene sieve plates (18), quartz sand (17), adsorbents (16), quartz sand (17) and polytetrafluoroethylene sieve plates (18) arranged in sequence.

4. The multi-stage dynamic adsorption device for treating unsymmetrical dimethylhydrazine waste liquid according to claim 3, characterized in that: A peristaltic pump (2), a first rotameter (5) and a second rotameter (6) are arranged on the pipeline connecting the adsorption column with the hydrazine waste water tank (1), and the first rotameter (5) and the second rotameter (6) are connected with the peristaltic pump (2) respectively.

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